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81-18-100-16 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

81-18-100-16: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.250 INCHES NOMINAL IN, material: STEEL OVERALL, drive_type: CROSS RECESS, grip_length: 0.285 INCHES NOMINAL IN, special_features: MATERIAL IS CASE HARDENED STEEL., shank_neck_length: 0.193 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-417-5121, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
81-18-100-16
NSN: 5325-01-417-5121
FSC: 5325 — Fastening Devices
CAGE: 94222 — SOUTHCO INC (USA)
SPECIFICATIONS
diameter0.250 INCHES NOMINAL IN
materialSTEEL OVERALL
drive_typeCROSS RECESS
grip_length0.285 INCHES NOMINAL IN
special_featuresMATERIAL IS CASE HARDENED STEEL.
shank_neck_length0.193 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
turnlock_stud_head_styleFILLISTER
stud_shank_major_diameter0.160 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.090 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
NSN5325-01-417-5121
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 81-18-100-16 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.090 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
SHANK NECK LENGTH: 0.193 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER
•
STUD SHANK MAJOR DIAMETER: 0.160 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.090 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
DIAMETER0.250 INCHES NOMINAL IN
SHANK NECK LENGTH0.193 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFILLISTER
STUD SHANK MAJOR DIAMETER0.160 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL IS CASE HARDENED STEEL.
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 81-18-100-16?
81-18-100-16 is a STUD,TURNLOCK FASTENER.
What is the NSN for 81-18-100-16?
81-18-100-16 is cataloged in the U.S. Government catalog under NSN 5325-01-417-5121. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.